CN203452185U - High-strength steel tube beam endless support polygonal frame - Google Patents
High-strength steel tube beam endless support polygonal frame Download PDFInfo
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- CN203452185U CN203452185U CN201320547773.2U CN201320547773U CN203452185U CN 203452185 U CN203452185 U CN 203452185U CN 201320547773 U CN201320547773 U CN 201320547773U CN 203452185 U CN203452185 U CN 203452185U
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Abstract
The utility model relates to the technical field of power grid devices, in particular to a high-strength steel tube beam endless support polygonal frame which comprises a frame body, wherein the frame body comprises an end connection member and beam columns. The end connection member is arranged at the connection joint position of the beam columns which are made of polygonal steel tubes, the end connection member is provided with an installation hole, and the shape of the installation hole is matched with the shape of the cross section of each of the beam columns. By means of the structural design, the beam columns are made of the polygonal steel tubes optimally, the installation hole in the end connection member is of the structure matched with the shape of the cross section of each of the beam columns, the beam columns are inserted into the installation hole, and rotation limit can be achieved through the shape of the installation hole, rotation of the beam columns is avoided, and therefore, the beam columns and the end connection member can be installed conveniently. Furthermore, the beam columns cannot rotate, so that the stability of the whole frame system is improved.
Description
Technical field
The utility model relates to grid equipment technical field, more particularly, particularly for no reason supports many ribs high strength steel pipe beam framework.
Background technology
In transformer substation framework is used, generally can be applied to structural beams framework, for support, overlap joint or Change-over frame ceases to be busy.
In the prior art, structural beams framework is spliced by beam column, and beam column adopts round steel pipe structure design, at the connected node place of beam column, is provided with connecting elements, and beam column is inserted in connecting elements, thereby realize between beam column, connects.Because beam column adopts round steel pipe structure design, easily rotate, cause the increase of structural beams framework installation difficulty.
Utility model content
The purpose of this utility model is to provide a kind of many ribs high strength steel pipe beam framework that for no reason supports, to solve the above problems.
A kind of many ribs high strength steel pipe beam framework that for no reason supports is provided in embodiment of the present utility model, include framework main body, described framework main body includes end part connecting component and beam column, described end part connecting component is arranged at the connected node place of described beam column, described beam column is many ribs steel pipe, described end part connecting component has installing hole, and the pass of described installing hole and the cross sectional shape of described beam column coincide.
By said structure, design, beam column optimal design is many ribs steel pipe, and, the installing hole having on end part connecting component is designed to the structure identical with many ribs steel tube section shape, beam column is plugged in installing hole, can carry out rotary spacing by its shape, avoid beam column to rotate, thus the installation of being more convenient between beam column and end part connecting component.And, because beam column cannot rotate, also improved the stability of whole construction system.
Accompanying drawing explanation
Fig. 1 supports the partial structurtes schematic diagram of many ribs high strength steel pipe beam framework for no reason in a kind of embodiment of the utility model;
In Fig. 1, the corresponding relation of component names and Reference numeral is:
The specific embodiment
Below by specific embodiment, also by reference to the accompanying drawings the utility model is described in further detail.
Please refer to Fig. 1, Fig. 1 supports the partial structurtes schematic diagram of many ribs high strength steel pipe beam framework for no reason in a kind of embodiment of the utility model.
The utility model provides a kind of many ribs high strength steel pipe beam framework that for no reason supports, and includes framework main body, and framework main body includes end part connecting component 2 and beam column 1, and end part connecting component 2 is arranged at the connected node place of beam column 1.On an end part connecting component 2, many beam columns 1 can be installed, thereby form construction system.In the utility model, in order to reduce, for no reason support the technology difficulty that many ribs high strength steel pipe beam framework is built, at the utility model beam-column 1, be many ribs steel pipe, end part connecting component 2 has installing hole 21, and the cross sectional shape of the pass of installing hole 21 and beam column 1 coincide.
By beam column 1 optimal design, it is many ribs steel pipe, and, the installing hole 21 having on end part connecting component 2 is designed to the structure identical with many ribs steel tube section shape, beam column 1 is plugged in installing hole 21, can carry out rotary spacing by its shape, avoid beam column 1 to rotate, thus the installation of being more convenient between beam column 1 and end part connecting component 2.And, because beam column 1 cannot rotate, also improved the stability of whole construction system.
Particularly, in an embodiment of the present utility model, framework main body is A word framework main body, and being connected to of 1 of beam column 1 and end part connecting component 2 and beam column is rigidly connected.
In the utility model, the length of beam column 1 is 120mm to 180mm, is specially 150mm.Certainly, in actual applications, the length of beam column 1 can need to be set according to concrete use.
In order to improve the Rigidity and strength of beam column 1, in a specific embodiment of the present utility model, beam column 1 is ASTM A572 Gr65 high strength steel beam column.ASTM A572 Gr65 high strength steel beam column is high-strength power tower bar steel.In another specific embodiment of the present utility model, beam column 1 is Q460C high strength steel beam column.
In order to improve the anti-corrosive properties of beam column 1, the utility model is also provided with coating for protection against corrosion on the surface of beam column 1.Particularly, coating for protection against corrosion is aluminium coated.Or in another embodiment of the present utility model, coating for protection against corrosion is zinc coat.
The utility model is adopted to the feasibility analysis of many ribs steel pipe:
(1) many ribs steel tube section characteristic and pipe are approximate
Many ribs steel pipe column substitutes traditional round steel pipe column cross section characteristic, along with increasing of many ribs tube edge number, its cross section property and pipe are more approaching, (pipe: moment of inertia I=0.393D identical with round steel pipe on the cross section its mechanical properties of many ribs steel pipes more than 12 limit shapes
3* t; 12 limit shape pipe: moment of inertia I=0.411D
3* t.D, t are respectively external diameter, the thickness of steel pipe).Therefore, when section area is close, both can replace mutually.Due at present more ripe for calculating, the design theory of the round steel pipe A word post in framework, in addition in power industry, have at present Duo Jia professional production manufacturer, can guarantee that the crudy of many ribs steel pipe meets the instructions for use of power industry, it is feasible adopting many ribs steel pipe column to substitute traditional round steel pipe column.
(2) beam column rigidly connects
In view of the change of steel structure, originally traditional girder truss and column articulated connected mode have been not suitable with new steel structure, for no reason support the joint form (seeing Fig. 1) that many ribs high strength steel pipe beam framework adopts beam column to rigidly connect.This form is applicable to mechanization manufacture, on-the-spot easy for installation, but for being designed with higher requirement.
(3) thermal stresses
Because new form of structure has changed the node connected mode of continuous frame, beam column changes into and being rigidly connected, and continuous beam length may reach 150m left and right, and thermal stresses has just displayed the impact of structural internal force, is below the analysis to thermal stresses in structure:
1) < < Code for design of steel structures > > GB500172-2003 8.1.5 bar: the length of temperature division of outdoor structure (spacing at shrinkage joint), when being no more than 120m, calculation of temperature stresses not;
2) for no reason support many ribs high strength steel pipe beam framework and show in the practice of using, variations in temperature is on exposing the limited that affects of steel work generation, and domestic is generally by setting up temperature joint to meet this structure requirement.Common worry mainly originates from the body of rod causing because of variations in temperature that concrete structure of the same type is existed and ftractures, because concrete tensile property is very poor, by contrast, the performance of steel work is well a lot;
3) theory by framework is calculated and is shown that the existence of end support makes thermal stresses effect more obvious, and this is because the constraint of end makes structure be difficult for discharging the temperature difference and causing distortion, retrains manyly more greatly, and the internal stress of member is more obvious; In addition, under similarity condition, high strength steel more can be resisted thermal stresses than common Medium And Low Strength Steels, because both modulus of elasticity are the same with temperature deformation coefficient, therefore the thermal stresses producing is also identical, and the same thermal stresses producing shared ratio common iron in high strength steel is little a lot;
4), under huge variations in temperature, at the bottom of the post of framework, ground has distortion to a certain degree, thereby make the stressed lax of total.The theoretical calculating of shadow response ratio of thermal stresses is smaller.To sum up, variations in temperature can be on the limited impact of the stressed generation of framework; Can be by structural element reserved strength to lay in to guarantee the safety of structure; With respect to common low-intensity steel, high strength steel has very large advantage resisting in variations in temperature.
(4) local buckling
The traditional general form of structure adopting of trussed construction framework of China is: the main material of beam adopts 3 No. 20 seamless steel pipes to be triangularly arranged (or 4 No. 20 seamless steel pipes are quadrangle layout), abdomen material adopts angle steel, main abdomen material by gusset plate with bolt or be welded to connect the space truss system of formation.If adopt many ribs steel pipe to substitute, in order to guarantee that beam has enough strength and stiffness, must adopt the larger many ribs steel pipe of diameter.As according to existing national standard, require thickness of steel pipe size thicker, just seem very uneconomical.
< < Code for design of steel structures > > GB 5001722003 5.4.5 bar regulations, " compressed member of circular hollow section, its external diameter should not surpass 100 (235/fy) with the ratio of wall thickness ".Can find out, the local stability of steel pipe is closely related for the restriction of its radius-thickness ratio and the yield strength of steel, and fy is larger, and D/t restriction is tighter.With the satisfied design of Q235B (fy=235MPa), if go to substitute with more high-intensity steel, D/t restriction is tighter, there will be local buckling.
The Steel Pipe Design of American-European countries tends to use larger radius-thickness ratio, uses larger diameter and less wall thickness.And the domestic restriction due to existing norm of steel structure is tended to by less radius-thickness ratio.Because the second moment of area I of steel pipe is proportional to D3 * t, for same steel weight, increase diameter D much more remarkable for the increase rigidity of the body of rod and the effect of flexural strength than increasing wall thickness t.
External standard is all consistent for the design formulas of polygonal steel pipe local buckling, and its basic ideas are:
1) during w/t≤a, without considering local buckling;
2), during a<w/t≤b, consider local buckling, the permissible stress reduction of steel;
3) do not allow that in principle w/t>b or now reduction obtain quite severe.
With external standard, compare, China < < Code for design of steel structures > > GB50017-2003 stipulates more deadly, has limited to a certain extent high strength steel application structurally.And the regulation to the press-bending local stability of polygonal member in new China power industry standard < < aerial power transmission line Designing Steel Tube Pole technical stipulation > > (DL/T5130-2001) 8.2.2 promulgating, with reference to the design formulas in ASCE No.72, more reasonable.
(5) adopt high-strength steel
ASTM A572 Gr65 and Q460C steel have very high yield strength (be about Q235B 2 times) and ductility preferably.It will be further appreciated that, owing to strictly having controlled the content of micro-silicon (Si), zinc-plated or aluminium-plated effect is improved greatly, the structure of steel surface and zinc layer is tightr, and galvanizing quality is good, can be non-maintaining for prolonged period of time.
(6) support for no reason
For no reason supportting many ribs high strength steel pipe beam framework is space frame system, and beam column is rigidly connected, acting in conjunction.For framework A word post, because beam column rigidly connects, it also possesses certain rigidity outward in plane, can make full use of the characteristic of high-strength steel, and end support is not set, and saves the area and steel.
These are only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. for no reason support many ribs high strength steel pipe beam framework, include framework main body, described framework main body includes end part connecting component and beam column, and described end part connecting component is arranged at the connected node place of described beam column, it is characterized in that,
Described beam column is many ribs steel pipe, and described end part connecting component has installing hole, and the pass of described installing hole and the cross sectional shape of described beam column coincide.
2. many ribs high strength steel pipe beam framework that for no reason supports according to claim 1, is characterized in that, described framework main body is A word framework main body, and being connected between described beam column and described end part connecting component and described beam column is rigidly connected.
3. many ribs high strength steel pipe beam framework that for no reason supports according to claim 1, is characterized in that, the length of described beam column is 120mm to 180mm.
4. many ribs high strength steel pipe beam framework that for no reason supports according to claim 1, is characterized in that, described beam column is ASTM A572Gr65 high strength steel beam column.
5. many ribs high strength steel pipe beam framework that for no reason supports according to claim 1, is characterized in that, described beam column is Q460C high strength steel beam column.
6. many ribs high strength steel pipe beam framework that for no reason supports according to claim 1, is characterized in that, described beam column surface is provided with coating for protection against corrosion, and described coating for protection against corrosion is aluminium coated.
7. many ribs high strength steel pipe beam framework that for no reason supports according to claim 1, is characterized in that, described beam column surface is provided with coating for protection against corrosion, and described coating for protection against corrosion is zinc coat.
8. according to many ribs of the support for no reason high strength steel pipe beam framework described in claim 1 to 7 any one, it is characterized in that, described beam column is many ribs steel pipe more than twelve edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320547773.2U CN203452185U (en) | 2013-09-04 | 2013-09-04 | High-strength steel tube beam endless support polygonal frame |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320547773.2U CN203452185U (en) | 2013-09-04 | 2013-09-04 | High-strength steel tube beam endless support polygonal frame |
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| CN203452185U true CN203452185U (en) | 2014-02-26 |
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| CN201320547773.2U Expired - Lifetime CN203452185U (en) | 2013-09-04 | 2013-09-04 | High-strength steel tube beam endless support polygonal frame |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106743144A (en) * | 2016-12-20 | 2017-05-31 | 能立方（天津）环保科技有限公司 | A kind of novel steel tube supporting girder structure |
-
2013
- 2013-09-04 CN CN201320547773.2U patent/CN203452185U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106743144A (en) * | 2016-12-20 | 2017-05-31 | 能立方（天津）环保科技有限公司 | A kind of novel steel tube supporting girder structure |
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| GR01 | Patent grant | ||
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Granted publication date: 20140226 |
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| CX01 | Expiry of patent term |